While you're right people will want an actual plan on how things are going to change, they also want a genuine expression of contrition. As hguhghuff noted, deleting someone's business is a serious, serious issue.
The _only_ admissions of guilt or wrongdoing was were these lines:
"Here’s what we are doing to be as good as our word, and provide a more careful, accurate, thoughtful and empathetic account management experience for our GCP customers."
"We sincerely apologize to all our customers who’ve been concerned or had to go through a service reinstatement. Please keep the feedback coming, we’ll work to continue to earn your trust every day."
Which, if you yourself were scared that your livelihood could be wiped away, would you think that was a sufficient apology?
It doesn't help that Google tends to lack a human touch when it comes to its image. But here, now, you all have an opportunity to change that. I know it sounds "politics" or "public relations" or whatever, but all we need to know is that you fully understand the fear GCP customers felt and what that means for us.